Once again, I read the text on the lock: "Only the Master of Secrets has the key to this lock".

I didn’t know who this Master of Secrets was, but I had to find him. Hopefully, he was on this train. I looked around the empty wagon where I woke up. The seats were fancy and clean, but empty. All but one... Something was lying on one of the seats. As I got closer, I saw that it was a train ticket. It appeared that coffee was spilled all over it, so it was impossible to read the origin and the destination, but the ticket was issued not too long ago: On June 14th, 1911. On the little table, next to the seat, there were two empty teacups. On the table next to it, an old, dusty wooden abacus was standing.

It looked like nobody has touched it for years. There was a tiny inscription on it "Fatto In Italia". I tried to lift the abacus, but the object didn't move, as if someone glued it to the table. It appeared that nothing in the wagon was of any use for me. Confused I walked through the wagon until I got to the orange door on the other side. The door would lead to the second wagon. I pushed it but it didn't move... I was locked out!

Both, the door to the engine and the door to the rest of the train were locked. Staring at the orange door, I noticed that the door and the abacus were of the same color, maybe even of the same material. It seemed that there was some kind of connection between the door and the abacus. Maybe, if I moved the stones on the abacus in a certain order, the door would open...